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Critical severity9.8NVD Advisory· Published Dec 3, 2025· Updated Jun 17, 2026

CVE-2025-66489

CVE-2025-66489

Description

Cal.com is open-source scheduling software. Prior to 5.9.8, A flaw in the login credentials provider allows an attacker to bypass password verification when a TOTP code is provided, potentially gaining unauthorized access to user accounts. This issue exists due to problematic conditional logic in the authentication flow. This vulnerability is fixed in 5.9.8.

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Affected products

3
  • Calcom/Cal.comv52 versions
    < 5.9.8+ 1 more
    • (no CPE)range: < 5.9.8
    • (no CPE)range: <5.9.8
  • Cal/Cal.com
    cpe:2.3:a:cal:cal.com:*:*:*:*:*:*:*:*
    Range: <5.9.8

Patches

Vulnerability mechanics

References

1

News mentions

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